Thievius Raccoonus
The True Master Thief
I realize that it is a fictional game, but I can't be the only one who wonders this question. As for my thought I figure that Bells are based on Japanese Yen which is ~8.5 US cents according to Google. Though, beyond that I figure that with many of the items being around 500 for common household things that cost an average of 25-100 US dollar, I'd figure that 1 Bells would probably be around 5 to 50 to a buck. That said your basic house would be 108,000 Bells (including the 10,000 Bells down) would be $540k to $5.4M, which doesn't make sense...